Clamp.



Patented Sept. 24, I901;

No. 683,184. I

J. P. ROEKWELL.

, NITED STAT S PATENT QFFIGE:

JAMES P. ROCKWELL, OF EAST \VINDSOR HILL, CONNECTICUT.

CLAMP.

SPECIFICATION forming part of Letters Patent No. 683,184, datedSeptember 24, 1901.

Application filed June 27, 1901. Serial No. 66,218. (No model.)

' To all whom it may concern:

Be it known that I, JAMES P. ROCKWELL, a citizen of the United States,residing at East \Vindsor Hill,in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inClamps, of v each other, and the blocks 2 and 3 are simiwhich thefollowing is a specification.

This invention relates to those clam ps which are particularly designedfor forcing together the glued edges of thin pieces of wood.

The object of the invention is to provide a very simple, inexpensive,and convenient clamp which is so constructed that very thin pieces ofwood may he gripped and the abutting ends or edges of new joints, oldjoints, cracks, or splits extending in the same plane or planes at rightangles with each other may be tightly forced together while glue orother adhesive material which has been applied is setting.

The embodiment of the invention that is illustrated by the accompanyingdrawing has four rectangularly arranged blocks, each block having a pairof screws extending through each end at right angles with each other, sothat each block is connected at each end with both of the adjacentblocks.

The drawing shows a perspective view of one of the clamps.

The four blocks 1, 2, 3, and 4, which are illustrated, are practicallysimilar in form. These blocks may be made of wood, iron, or any othersuitable material, of any desired size, and may or may not be providedwith inwardly-extending jaw-faces 5 or grooves 6 in the jaw-faces. Ascrew 7, with a head 8, passes loosely through a smooth perforation intheblock 1 and through a threaded perforation near one end of the block2. By means of this screw the jaw ends of the blocks 1 and 2 may bedrawn toward or opened from each other. A spiralspring 9 is placed uponthis screw to thrust these two blocks apart. a A screw 10, with a head11, extends through a threaded perforation near the other end of theblock 1 and butts against the block 2. By turning this screw the jawends of the blocks 1 and 2 may be forced together or loosened from eachother as a common woodclamp. The blocks 4 and 3 are connected togetherin a similar manner by the compression-screw 12 near one end andexpansionscrew 13 near the other end, so that the jaw ends of theseblocks may be forced toward or loosened from each other. The blocks 1and 4 are connected by the compression-screw 14 and expansion -screw 15,so that their jaw ends may be forced toward or loosened from larlyconnected by the compression-screw 16 and the expansion-screw 17, sothat they may be forcibly opened and closed from each other. By means ofthe screws 7 and 12 the jaw ends of the blocks 1 and 4 may be movedtoward or from the jaw ends of the blocks .2 and 3, respectively, and bymeans of the screws 14 and 16 the jaw ends of the blocks 1 and 2 may bemoved toward or from the jaw ends of the blocks 4 and 3, respectively.If it is desired to glue together the ends or edges of two thin piecesof wood to form a new joint or to mend an old joint, one piece, or thepiece on one side of the joint or crack, may be clamped between theblocksl and 2 by the screws 7 and 10. The other piece, or the piece onthe other side of the crack, is then clamped between the blocks 3 and 4by the screws 12 and 13. Then by means of the screws 14 and 16 and 15and 17 the two parts are forced together, so that the edges will bejoined or the crack closed and held until the adhesive material hasbecome set. If it is desired to fasten one piece at right angles toanother piece,

one piece may be clamped between the jaws 1 and 2 and the other piececlamped between the jaws 1 and 4 and 2 and 3 against the edge of thepiece held between blocks 1 and 2. Round or rectangular pieces may beheld by clamping them in the grooves in the jawfaees. Many shapes ofthin or thick pieces may be gripped and then forcibly brought togetherby means of this clamp. Pieces of this wood which have spread apart orwhich it is desired to draw together edgewise to form a special shapemay be readily fastened between the jaws and then brought together bymeans of this clamp. This clamp is particularly serviceable for mendingcracks in such articles as violin sounding-boards and cases which arevery thin and of peculiar shape.

I claim as my invention- 1. Aclamp consisting of fourrectangularlyarranged blocks each of which is connected with both of theadjacent blocks bya pair of of the other of the pairs by compression andscrews, one pair extending at right angles to expansion screws,substantially as specified. the other-pair, substantially as specified.1 1

2. Aclampconsistingoffourrectangularly- JAMES ROCKWELL 5 arranged blocksconnected together in pairs Witnesses:

by compression and expansion screws and V. R. HOLCOMB, each one of thepairs connected with each H. R. WILLIAMS.

